Why Use Cold-Formed Steel Girts?
Whether one chooses a Z-section or a C-section, the cold-formed steel girt facilitates the erection of the wall system. For example, metal wall panels can be quickly and easily attached to the girt by using self-drilling screws. For positive pressure, the girt is assumed to be laterally braced by the wall panel. For negative or suction loads, bracing (i.e. sag rods) is often not required. Section C3.1.3 of the North American Specification for the Design of Cold-Formed Steel Structural Members (North, 2001) provides a design methodology by which the wall panel and the screw connection of the wall panel-to-girt is used as a tension flange brace. The design methodology promulgated by Section C3.1.3 reduces the yield moment by using an empirically derived constant. The design methodology of Section C3.1.3 also applies to purlins attached to through-fastened roof panels. When using cold-formed steel girts, it is important to recognize that these members are typically limited to maximum span
Related Questions
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